Enhancement of the irreversibility field in bulk MgB2 by TiO2 nanoparticle addition

G.J. Xu, Jean-Claude Grivel, A.B. Abrahamsen, N.H. Andersen

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    MgB2 samples doped with TiO2 nanoparticles were prepared and the effect of TiO2 addition on the superconducting transition temperature (T-c), irreversibility field (H-irr) and critical current density (J(c)) were investigated. It is found that the hexagonal lattice parameters a and c decrease with TiO2 doping. Tc decreases gradually from 38.2 to 37.8 K as the TiO2 content increases from 0 to 15 wt%. The H-irr increases at 20 K from 4.3 to 4.9 T as the TiO2 content increases from 0 to 10 wt%, and at the same temperature J(c) increases from 450 to 4250 A/cm(2) at 4.2 T. (C) 2004 Published by Elsevier B.V.
    Original languageEnglish
    JournalPhysica C: Superconductivity and its Applications
    Issue number1-2
    Pages (from-to)95-99
    Publication statusPublished - 2004


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